Screw closure for containers and method of making the same



Jan. 2, 1923. L44@,984

C. HAMMER SCREW CLOSURE FOR CONTAINERS AND METHOD OF MAKING THE SAME.

FILED APR. 19 1921 Patented Jan. 2, I923.

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CHARLES HAMMER, OF QUEENS, NEW YORK, ASSIGNOR TO AMERICAN METAL CAP COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

SCREW CLOSURE FOR CONTAINERS AND METHOD OF MAKING THE SAME.

Application filed April 19, 1921.

To all whom it may concern:

Be it known that 1, CHARLES HAMMER, a citizen of the United States, and a resident of Queens, in the county of Queens and State of New York, have invented certain new and useful Improvements in Screw Closures for Containers and Methods of Making the Same, of which the following is a specification.

The object of the present invention is to provide an improved form of metal closure for glass containers of various forms, such as bottles and jars having screw threads or lugs,'and to the method of making such closure, and which closure is provided with inwardly projecting portions or projections for engagement with the screw threads or lugs on the container, and by means of which the closure will be tightly clamped thereon, but easily and quickly released therefrom, and in which the raw edge of the flange or skirt of the closure is concealed or covered, thereby eliminating the danger of cutting the hands and largely preventing the formation of rust due to moisture, acids, etc., and

in which closure a rounded or beaded portion of the margin of the skirt is inwardly deflected without materially changing the cross sectional shape of such deflected por- 10 tion.

A further" object of the invention is the provision of an improved metal closure in which a rounded or hollow portion of the skirt margin is deflected inwardly at inter- 5 vals in such manner that it is connected with the skirt beyond or above the same by a deflected portion, which will in certain forms of these projections act to engage the jar threads or lugs of-the glass container.

0 In the accompanying drawing illustrating embodiments of my invention, Figure 1 is a bottom plan View of the closure.

Fig. 2 is a side elevation of the same.

Fig. 3 is a partialsection of the closure on the line 33 of Fig.1 and also illustrating in dotted lines a portion of a glass container.

Fig. 4 is a partial section on the line 4-4 of Fig. 1.

0 Fig. 5 is a partial plan View of a modification.

Fig. 6 is a of Fig. 5. I v i Fig. 7 shows the bead coiled beyond a 5 single convolution.

partial section on the. line 66 Serial No. 462,498.

The closure as set forth comprises a top not only is the cap provided with a strengthened and reinforced edge, but the raw edge of the cap is eliminated so that there is no danger or liability of the user cutting his hands, while at the of rust due to acids and moisture is materially prevented.

The skirt 8 may be provided with corrugations l0, and which extend from the top'7 nearly to the bead 9. These corrugations not only serve as a gripping means for the cap, but also serve to materially strengthen and reinforce the cap at its flange as well as the inwardly extending projections adj acent thereto. In fact, the corrugations and the rolled or beaded edge both materially reinforce the cap flange and serve to reinforce as it were, one another and the projections, whereby the cap will be maintained in its proper shape practically throughout the life of the cap.

At several intervals the bead 9 is deflected inwardly, shown at four places 12, in Fig. 1. Preferably, the cross-sectional area of the same time theformation bead at this deflected portion-12 is not altered, but the bead remains of uniform size throughout its By these ,deflected portions, lugs or projections 12 are provided on the inside of the closure skirt at its bottom part, and' these will engage the usual lugs or threads on a jar or bottle, that are inclined or spiral, and when the closure is placed on a jar of this character and turned, these projections 12 will engage with the lower face of the lugs and thus serve to draw the closure down on the jar or container, until the bottom face I of the top will engage the top edge of the entire length or perimeter.

container, whereby to securely seal the container, especially when the usualliner is used. In Figs. 1-4 the projections 12 on the interior of the closure extend through nearly in a straight line or may have a very slight inward curvature. In Figs. 5 and 6 a similar projection 13 is shown in the bead 14 corresponding to the bead 9, in which the projection is deflected inwardly to a greater extent and is in a form that is strongly convex toward the center axis of the cap.

It will be observed in the arrangement in Figs. 1-4 that in Fig. 3 when the bead 9 is deflected inwardly, it is attached to and supported from the flange 8 by a bent portion 15, which connects the head with the straight portion 8 of the skirt. This deflected portion extends inwardly and also upwardly,

' strengthen-the engaging portion 15 at each .of the entire closure.

projection. The bead 9 together with the corrugations 1O serve to strengthen the skirt, and to prevent undue bending or distortion It will of course depend largely upon the formation of the threads of the glass container and the amount of inward deflection of the bead as to just what part'of the projections come into engagement with the under surfaces of the threads or lugs of the jar, the fact being that the head is deflected inwardly suflicient to enable the proper formation of a projection to engage the jar threads whether this be a portion of the upper wall of the bead itself or a part or all of the deflected portionof the skirt or the two combined.

In the arrangement shown in Figs. 5 and 6 the construction is substantially the same, except that the curved projection 13 is connected with the skirt portion 17 byawall similar to the wall 15,;which extends inwardly from the vertical flange wall 8, and also upwardly, and merges into the substantially circular bead 9. This arrangement .may also havethe same form of corrugation 10 on the skirt 82 A closure formed in this manner will be,

comparatively easy to manufacture, as a straight flanged cap is simply beaded or rounded, at its margin, and then the bead simply pushed "radially inward'at several portions; and the corrugations in the skirt formed in the usual manner.

In Fig. 7 a silght modific'ationis shown in which the projections 12' are formed from a bead 19 that is coiled more than a single convolution, whereby the raw edge. of the margin is brought insideof the bead and the bead is thereby strengthened.

The deflected portions 12 of the bead 9 are preferably formed by pushing inward the bead by a member 20 provided with a grooved, edge or face 21 and can engage the bead and move it inwardly without which may be readily made from thin sheet metal and yet have suflicient strength and rigidity to maintain its shape, a blank is first stamped into hat shaped form, that is,

comprising a top and aflange or skirt, and

then either before or after the formation of the hollow reinforcing edge provided with .the corru ations.\ The hat shaped blank is then su jected to suitable pressure to form the hollow or beaded edge 9, and this beaded edge is then subjected to pressure radially of the cap by some suitable means, as shown at 20-21 Fig. 4, thereby to press or deflect the hollow edge or head inwardly toward the'center of the cap at intervals according-to the number. of projections it is desired to form, and it will be observed that in the present case these projections, when the cap is completed have substantially the same circular contour or cross section as has that portion of the beaded or curled or rounded edge of the cap that has not been pressed inwardly. I believe therefore, that I am the first to form a metal closure with locking projections by utilizing a beaded or curled or hollow strengthened edge of the cap for this purpose without substantially changing the cross section of such projections as compared with the strengthened edge.

The term closed as used herein is intended only as a word of description and not as a word of limitation, that is to say, the bead may be substantially closed for all practical purposes, and therefore it will be understood that by describing in detail herein any particular form, structure, or arrangement it is not intended to limit the invention beyond the terms of the several claims or the requirements-pf the prior art.

What 1 claim is:

L A closure for a container having threads of lugs, comprising a top and a skirt having the lower margin rolled to form a continuous annular closed bead that .is deflected inwardly at several portions while maintaining a substantially uniform circular cross section throughout the entire bead, whereby container lug engaging portions are provided .on the interior of the closure.

2. A closure for a container having threads or lugs, comprising a top and a skirt having the lower margin rolled to bead having bead, whereby container lug engaging portions are provided on the interior of the closure.

3. A closure for threads or lugs, comprising a top and a skirt having the lower margin rolled to form a bead, said bead having a plurality of portions thereof deflected inwardly be yond the normal line of the bead, the skirt having portions deflected inwardly to merge into said bead inward deflections, which skirt deflected portions constitute the lug engaging portions of the closure.

4. A closure fora container having threads or lugs, comprising a top and a skirt having the lower margin rolled to form a contlnuous annular closed bead that is deflected inwardly at several portions while maintaining a substantially uniform '4 circular cross section throughout the entire bead, the skirt having portions deflected inwardly to merge into said bead inward deflections, Which skirt deflected portions constitute the lug engaging portions of the closure.

5. A closure for a container having threads or lugs, comprising a top and a skirt having *the lower margin rolled to form a bead, said bead having a plurality of portions thereof deflected inwardly beyond the normal line of the bead and on lines curved convex towards the center axis, the skirt being deflected inwardly to merge into said bead inward deflections, which skirt deflected portions constitute the lug engaging portions of the closure.

closure for a container having threads or lugs, comprising a top and a skirt having thelower margin rolled to form a continuous annular closed bead that is deflected inwardly at several portions on lines curved convex towards the center axis while maintaining a substantially uniform circular cross section throughout the bead, the skirt being deflected inwardly to merge into said bead deflected portions, which skirt deflected portions constitute the thread-engaging portions of the closure.

closure for a container having lugs or threads, comprising a top and a vertical skirt portion, the lower part of the skirt at intervals being deflected inwardly beyond the normal margin of the skirt with the marginal portion rolle'dinto the form of a closed circular head that merges into the said deflected skirt portion at a considerable distance inside of and beyond the said vertical skirt portion, which skirt deflected portions constitute the lug engaging portions of the closure. j

8. A rotatable metal closure for a container having threads or lugs and comprising a top and a skirt having the lower edge pro vided with a beaded or curled edge, said a plurality of portions thereof a container having deflected inwardly to form container engaging projections and having substantially tainer having threads or lugs and comprising a top and a skirt having the lower edge provided with a continuous substantially circular hollow bead, saidbead having a plurality of portions thereof deflected inwardly to form container engaging projections, said bead and inwardly deflected portions having substantially the same cross section.

10. A rotatable metal closure for a con tainer having threads or lugs and comprising a top and a depending skirt having reinforcing corrugations, the lower edge of said skirt being provided with a continuous hollow reinforcing bead of substantially circular form in cross section, said bead having a plurality of portions thereof deflected inwardly to form container engaging projections and each having substantially the same cross section.

11. The method of making a rotatable closure cap, which consists in providing a hat-shaped blank comprising a top and a depending skirt, then subjecting the lower edge of the skirt to pressure to form ahollow beaded or curled edge, and then subjecting the hollow beaded edge at intervals topressure radially of the cap to deflect portions of said bead inwardly relatively to the major portion of the bead to form container engaging projections and maintaining the said deflected portions of substantially the same hollow formation in cross section as the bead.

12. The method of making a rotatable closure, which consists in first forming a shell having a top and a flange, then forming a reinforced or strengthened edge, and then forcing said strengthened edge inwardly radially of the closure to form projections while maintaining the cross section of said projections substantially the same as that of the strengthened edge.

13. A rotary metal closure for a glass container having a plurality of locking projections formed from a curled edge, said projections having substantially the same cross section as said curled edge.

14:- A closure of the class described having a top and a depending flange provided with a rolled edge having inwardly extending locking projections formed from said rolled edge by deflecting practically all of the rolled edge at intervals around the flange to iorm said projections extending inwardly toward the-center of the cap.

15. A closure of the class described having a top and a depending flange provided with a rolled edge'having inwardly extending projections formed from said rolled edge by deflecting practically the whole of said rolled edge inwardly of the flange at intervals therearound.

16. A closure of the class described having a top and a depending flange provided with a rolled edge having inwardly extending locking project-ions formed from said rolled edge by deflecting practically all of the rolled edge at intervals around the fl'ange to form said projections extending inwardly toward the center of the cap, said flange having strengthening portions intermediate the rolled edge, projections, and top.

17 A closure of the class described having a top and a depending flange provided with a rolled edge having inwardly extending projections formed from said-rolled edge by deflecting practically the whole of said rolled edge inwardly of the flange at intervals therearound, said flange having strengthening corrugations intermediate the rolled edge, projections, and top.

18. A metal cap comprising a skirt having a head or curl adjacent to its lower edge, and a plurality of inwardly extending projections formed at intervals from such head in such manner that practically all of the head is deflected inwardly from the outer margin of the skirt.

Signed at New York city, N. Y., on April 18, 1921.

CHARLES HAMMER 

